/Engine/Source/Developer/SkeletalMeshUtilitiesCommon/Public/LODUtilities.h
Regenerate LODs of the mesh
true if succeed. If mesh reduction is not available this will return false.
static bool RegenerateLOD ( [USkeletalMesh](API\Runtime\Engine\Engine\USkeletalMesh) * SkeletalMesh, const class [ITargetPlatform](API\Developer\TargetPlatform\Interfaces\ITargetPlatform) * TargetPlatform, int32 NewLODCount, bool bRegenerateEvenIfImported, bool bGenerateBaseLOD )